Wind Hazard Modeling and the HAZUS Wind Model. Major Stakeholders Local, state and federal...
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Transcript of Wind Hazard Modeling and the HAZUS Wind Model. Major Stakeholders Local, state and federal...
Wind Hazard Modeling and the HAZUS Wind Model
Major Stakeholders
• Local, state and federal government agencies
• Humanitarian organizations
• Insurance industry
• Businesses and private citizens
Why Model Wind Damage?
• Understand/Prepare for Building Damage
• Understand/Prepare for Sheltering Requirements
• Understand/Prepare for Emergency Management Response
• Understand Economic Ramifications
• Provide Justification for Building Code Changes
Types of Damage and Loss Models
• Holistic, Actualized Cost Models
• Meteorological Models
• Load vs. Resistance Structural Damage Model
• Tree Damage Models
• Windborne Debris Damage Models
• Loss Models
“The HAZUS-MH Hurricane Model is designed to produce loss estimates for use by federal, state, regional and local governments in planning for hurricane risk mitigation, emergency preparedness,response and recovery.”
-HAZUS Technical Manual
About HAZUS
• Hazards United States (Multi-hazard)• Product of National Institute of Building
Sciences (NIBS) and Federal Emergency Management Agency (FEMA)
• Earthquake Model released in 1997• HAZUS-MH released in 2003• Flood Model and Hurricane Model• Geographical Information System (GIS)-
Based Model
HAZUS Availability and Requirements
• http://www.fema.gov/hazus/pdf/order_form_mh.pdf
• Software is free, but requires ArcGIS to operate
Hurricane Model Capabilities
Parameter/DataLevel 1
(Default Data)Level 2
(User-Supplied Data)Level 3
(Advanced Data)
Wind Model Default Probabilistic User-Defined Scenario
Building Inventory Default Probabilistic User-Supplied
Facilities and Building Classes
Residential Commercial Industrial Essential Facilities
Utility, Transportation and High Potential Loss Facilities
Display/Edit Locations Only - No Damage or Loss Estimation
Terrain Default Expert Supplied
Loss Functions Default
Damage Functions Default
Shelter Requirements Default User-Supplied Parameters
Debris Default
Wind Hazards Throughout the U.S.
Source: HAZUS-MH Wind Technical Manual
HAZUS Wind Model Framework
Elements shown in bold are implemented in the current version of the Hurricane Model
Source: HAZUS-MH Wind Technical Manual
Source: HAZUS-MH Wind Technical Manual
Creation of HAZUS Fast-Running Damage Functions
Residential Damage States
Damage State Qualitative Damage Description
Roof Cover Failure
Window Door
FailuresRoof Deck
Missile Impacts on Walls
Roof Structure Failure
Wall Structure Failure
0 No Damage or Very Minor DamageLittle or no visible damage from the outside. No broken windows, or failed roof deck. Minimal loss of roof cover, with no or very limited water penetration.
≤2% No No No No No
1 Minor DamageMaximum of one broken window, door or garage door. Moderate roof cover loss that can be covered to prevent additional water entering the building. Marks or dents on walls requiring painting or patching for repair.
>2% and ≤15%
One window, door, or garage door
failure
No <5 impacts
No No
2 Moderate DamageMajor roof cover damage, moderate window breakage. Minor roof sheathing failure. Some resulting damage to interior of building from water.
>15% and ≤50%
> one and ≤ the
larger or 20% &3
1 to 3 panels
Typically 5 to 10 impacts
No No
3 Severe DamageMajor window damage or roof sheathing loss. Major roof cover loss. Extensive damage to interior from water.
>50%> the
larger of 20% & 3 and ≤50%
>3 and ≤25%
Typically 10 to 20 impacts
No No
4 DestructionComplete roof failure and/or, failure of wall frame. Loss of more than 50% of roof sheathing.
Typically >50% >50% >25%
Typically >20
impactsYes Yes
Change this slide to gable, no secondary water resistance, no shutters and with a garage.